coordinatorlayout下拉刷新

@Override

public voidonOffsetChanged(AppBarLayout appBarLayout, intverticalOffset) {

if(verticalOffset ==0) {

Timber.e("可以下拉");

mNewsHouseFragmenr.onAppBarExpanded();

}else{

Timber.e("不能下拉");

mNewsHouseFragmenr.onAppBarCollapsed();

}

}